Speedo only working when engine hot! RRW - Honda Motorcycles - FireBlades.org
Honda FireBlade Discussion of the Honda CBR 900RR, Honda CBR 929RR, Honda CBR 954RR, and Honda CBR 1000RR Motorcycles.

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post #1 of 13 Old 07-27-2011, 5:36 PM Thread Starter
 
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Speedo only working when engine hot! RRW

Just bought a 1998 RRW and the speedo works perfectly, but only once the engine temperature is up to 80 degrees plus. Anyone got any ideas what is causing this and how to fix it?

I know you may think sensor, but I can't see that the temperature would affect that.
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post #2 of 13 Old 07-27-2011, 8:57 PM
 
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Re: Speedo only working when engine hot! RRW

Things expand when they get hot.. So the sensor may not be getting the information needed while the motor is cold.

James Taylor
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post #3 of 13 Old 07-29-2011, 4:38 PM
 
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Re: Speedo only working when engine hot! RRW

i wouldn't ride the bike till at least 100 degrees at the earliest
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post #4 of 13 Old 07-29-2011, 4:58 PM Thread Starter
 
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Re: Speedo only working when engine hot! RRW

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Originally Posted by Purpleslug View Post
i wouldn't ride the bike till at least 100 degrees at the earliest
I'd never ride it then, runs at about 80 degrees!
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post #5 of 13 Old 07-29-2011, 5:09 PM
 
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Re: Speedo only working when engine hot! RRW

O my bad didn't notice you were in the UK lol
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post #6 of 13 Old 07-29-2011, 11:22 PM
 
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Re: Speedo only working when engine hot! RRW

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Originally Posted by keef69 View Post
Just bought a 1998 RRW and the speedo works perfectly, but only once the engine temperature is up to 80 degrees plus. Anyone got any ideas what is causing this and how to fix it?

I know you may think sensor, but I can't see that the temperature would affect that.
Just the speedo or tach also?
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post #7 of 13 Old 07-30-2011, 4:37 AM Thread Starter
 
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Re: Speedo only working when engine hot! RRW

It is just the Speedo. Sometimes it starts working, but then if I open her up, it stops again. The other day I drove at 40mph for 20 minutes, the bike was hot, but it did not start working. Then I stopped for 2 minutes, re-started the engine and a I drove off, it was working!
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post #8 of 13 Old 07-30-2011, 4:44 AM
 
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Re: Speedo only working when engine hot! RRW

My speedo was intermittent just like yours. It was the sensor. Not a cheap part either!
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post #9 of 13 Old 07-30-2011, 6:05 AM Thread Starter
 
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Re: Speedo only working when engine hot! RRW

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Originally Posted by vfrman View Post
My speedo was intermittent just like yours. It was the sensor. Not a cheap part either!
If no-one else has any ideas, maybe that's the way to go. 30 on Ebay, but may be worth spending out on a new one.
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post #10 of 13 Old 07-30-2011, 12:50 PM
 
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Re: Speedo only working when engine hot! RRW

If the speed sensor is off of the front sprocket, pull the cover, inspect it, clean it, and re-install. It might just be gummed up. But that would only solve the speedo issue, not the tach. I dont know where the tach gets it signal from on a 900rr
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post #11 of 13 Old 08-02-2011, 10:35 AM
 
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Re: Speedo only working when engine hot! RRW

His problem is only with the speedo. The sensor is in the top of the tranny, not on the spocket. That is how the old school mechanical speedos worked.. either off the sprocket or front wheel.
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post #12 of 13 Old 08-15-2011, 6:52 AM Thread Starter
 
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Re: Speedo only working when engine hot! RRW

I HAVE A SPEEDO!!

Got a second hand sensor on Ebay for 19.99 + p&p, solved the problem!
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post #13 of 13 Old 08-15-2011, 2:28 PM
 
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Re: Speedo only working when engine hot! RRW

Make sure non of your wiring is touching anything hot Radiator,engine atc. I had a problem summarily to yours . Wound up being my wiring harness was touching the radiator,so I went to my local hot rod shop and bought some heat resistant wiring wrap, you cold use an old coolant hose or something. Hope this helped you
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